The rigid membrane keyboard means that the graphics and circuits of the switch are made on the common printed circuit copper clad laminate. The rigid membrane keyboard is characterized by convenient materials, stable technology, low resistance, and the ability to directly weld certain components in the circuit on its back. In the case of a small area, the hard liner layer can be omitted. Rigid membrane keyboards generally use metal guides as conductive labyrinth contacts, so they have a better feel. The disadvantage is that it is not as convenient to install and connect in the whole machine as the flexible membrane keyboard, and it is often necessary to weld the plug-in unit and lead the lead through the flat cable. In addition to the buzzer signal and LED indication, the information feedback of the rigid membrane keyboard can generally use metal handle shrapnel.
